mm: remove unevictable_pgs_mlockfreed

Simply remove UNEVICTABLE_MLOCKFREED and unevictable_pgs_mlockfreed line
from /proc/vmstat: Johannes and Mel point out that it was very unlikely to
have been used by any tool, and of course we can restore it easily enough
if that turns out to be wrong.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ying Han <yinghan@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index ede4ddd466959d1c88e9b733107b6f8831f6ad1f..3d3114594370118addc16ee1156e9b19f6d97fef 100644 (file)
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -52,7 +52,6 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
                UNEVICTABLE_PGMUNLOCKED,
                UNEVICTABLE_PGCLEARED,  /* on COW, page truncate */
                UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */
-               UNEVICTABLE_MLOCKFREED, /* no longer useful: always zero */
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
                THP_FAULT_ALLOC,
                THP_FAULT_FALLBACK,

diff --git a/mm/vmstat.c b/mm/vmstat.c
index c30af3a2f9601f3aceec37595c39b7643dc5e68e..8fafa32e00cb6820912c96d3b5c66bcd01b415ca 100644 (file)
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -793,7 +793,6 @@ const char * const vmstat_text[] = {
        "unevictable_pgs_munlocked",
        "unevictable_pgs_cleared",
        "unevictable_pgs_stranded",
-       "unevictable_pgs_mlockfreed",   /* no longer useful: always zero */
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
        "thp_fault_alloc",